Seiko Cal. 6657 - 407

This Spring Drive model from 1990 features a 40mm Hardlex-Coated Steel case. With its 20mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-635c92a10b5b]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

60m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1990

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